Lubricating compositions



United States Patent Ice 3,127,353

Patented Mar. 31, 1964 3 127 353 MWM-diesel engine to a test such as has been described in Erdol und Kohle 12, 484- 8 LUBRICA'IIhiG oMPosrrIoNs pages 4 9 Ernst Roos, Leverkusen, Friedrich Lober, Leverkusen- Table Bayerwerk, and Walther Lohmar, Mulheim (Ruhr), Germany assignors to Farbenfabriken Bayer Aktiengesellsehaft, Leverkusen, Germany, a corporation of Arylglycide ether ga Germany N0 Drawing. Filed July 10, 1959, 581'. No. 826,124

5 @wom-on-om 66 4 Claims. 01. 252- 2 The present invention relates to lubricating compositions; more particularly it concerns lubricating composi- CH B tions containing a lubricant, especially a lubricant based on minenal oils, and an aryl-glycide ether of the general fl- 2 63 formula (311E R on: on,

O H GH-GH Q /l F wherein R stands for an alkyl radial containing at least E7 58 12 carbon atoms.

Suitable aryl-glycide ethers are for instance 4-dodecylphenoxy-p-ropene oxide, 4-is0dodecyl-phenoxy-propene 12 iso @-O-GH1-CH OH; 31 oxide, 3-pentadecyl-phenoxy-propene oxide, 4-octadecylphenoxy-propene oxide and 4-isooctadecyl-phenoxy-prm 25 P6116 oxide. O CH2 CH OH, 77

Aryl-glycide ethers of this type are obtainable by various methods, e.g. by reacting epichorohydrin with phe- 1101s which are substituted by an alkyl radical containing at least 12 carbon atoms, or by epoxylating the corre- 76 sponding arylallyl ethers; in general, they are viscous, colourless or slightly coloured, odourless liquids. 0

The aryl-glycide ethers present in the lubricating compositions of the invention increase mainly the thermal We claim: stability of the lubricants to which they impart good 35 A lubflcatlPg composltlon comprlsm'g mal0T high-pressure properties as well as detergent action; morep of a lubncant and 014% by Welght of an n over, it is remarkable that they are compatible with glyclde ether of the general formula other lubricant additives such as antioxidants or anti- 3 corrosion agents. The requisite quantities of aryl-glycide ethers may readily be established by preliminary 40 gexperiments; in general, an addition of 0.1 to 5 percent by weight, referred to the lubricant, is sufiicient.

It is already known to add to lubricants aryl-glycide 12 carbon atoms ethefs 0f the general formula 2. A lubricating composition comprising a major Ar-0-oH, oHoH, amount of a mineral oil lubricant and 0. 1-5 by weight of 4-isododecyl-phenoxy-propene oxide.

3. A lubricatin com osition com risin a ma'or Wher.em Ar Stanqs {or a phenyl. radwal which amount of a miner al oil liibricant and (51-57%; by weight substituted or which 15 only substituted by alkyl radicals of a 3 pentadecyl henox m ens oxide containing on the Whole at most 4 carbon atoms. Com- 5O 4 A Lubricating g g com risin a mabr pared with such additives the aryl-glycide others of the amo'unt of a miner al on lubricant and 5 5 weilht present invention are surprisingly more active. This of an 4 octadecyl henox m we oxide y g can be seen from the following table concerning relevant p y p p tests. The evaluation data were obtained by subjecting 1 mixtures of 100 parts by Weight of a naphthenic oil SAE 55 References Clted m the file of thls Patent 20 and 2 parts by Weight of one of the aryl-glycide ethers UNITED STATES PATENTS indicated for hours in a one-cylinder-four-stroke 2,665,254 Coppock Jan. 5, 1954 wherein R stands for an alkyl radical containing at least 

1. A LUBRICATING COMPOSITION COMPRISING A MAJOR AMOUNT OF A LUBRICANT AND 0.1-5% BY WEIGHT OF AN ARYLGLYCIDE ETHER OF THE GENERAL FORMULA 